/*
 * Licensed to the Apache Software Foundation (ASF) under one
 * or more contributor license agreements.  See the NOTICE file
 * distributed with this work for additional information
 * regarding copyright ownership.  The ASF licenses this file
 * to you under the Apache License, Version 2.0 (the
 * "License"); you may not use this file except in compliance
 * with the License.  You may obtain a copy of the License at
 *
 *     http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */

package org.apache.flink.connectors.hive.read;

import org.apache.flink.connector.file.src.FileSourceSplit;
import org.apache.flink.connector.file.src.util.CheckpointedPosition;
import org.apache.flink.connectors.hive.HiveTablePartition;
import org.apache.flink.core.fs.Path;

import org.apache.hadoop.mapred.FileSplit;

import javax.annotation.Nullable;

import java.io.IOException;

import static org.apache.flink.util.Preconditions.checkNotNull;

/**
 * A wrapper class that wraps info needed for a file input split.
 * Right now, it contains info about the partition of the split.
 */
public class HiveSourceSplit extends FileSourceSplit {

	private static final long serialVersionUID = 1L;

	protected final HiveTablePartition hiveTablePartition;

	public HiveSourceSplit(
			FileSplit fileSplit,
			HiveTablePartition hiveTablePartition,
			@Nullable CheckpointedPosition readerPosition) throws IOException {
		this(
				fileSplit.toString(),
				new Path(fileSplit.getPath().toString()),
				fileSplit.getStart(),
				fileSplit.getLength(),
				fileSplit.getLocations(),
				readerPosition,
				hiveTablePartition
		);
	}

	public HiveSourceSplit(
			String id,
			Path filePath,
			long offset,
			long length,
			String[] hostnames,
			@Nullable CheckpointedPosition readerPosition,
			HiveTablePartition hiveTablePartition) {
		super(id, filePath, offset, length, hostnames, readerPosition);
		this.hiveTablePartition = checkNotNull(hiveTablePartition, "hiveTablePartition can not be null");
	}

	public HiveTablePartition getHiveTablePartition() {
		return hiveTablePartition;
	}

	public FileSplit toMapRedSplit() {
		return new FileSplit(new org.apache.hadoop.fs.Path(path().toString()), offset(), length(), hostnames());
	}

	@Override
	public FileSourceSplit updateWithCheckpointedPosition(@Nullable CheckpointedPosition position) {
		return new HiveSourceSplit(splitId(), path(), offset(), length(), hostnames(), position, hiveTablePartition);
	}

	@Override
	public String toString() {
		return "HiveSourceSplit{" +
				"hiveTablePartition=" + hiveTablePartition +
				'}';
	}
}
